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利用X射线衍射技术研究冷拔+中间退火2169N奥氏体不锈钢管材的织构转变,及其对管材扩口性能的影响。结果表明,2169N钢的层错能为27.7M·J/m2,属低层错能级别,变形方式为机械孪生。管材存在{113}<121>主织构组分、{111}和{110}<001>次织构组分。{110}<001>织构为管材冷拔时产生,{110}<001>和{111}织构为管材中间退火转变而成,{113}<121>织构为{110}<112>经<111>旋转约40°转变生成。管材{113}<112>主织构组分、{111}和{110}<001>次织构组分均表现出较高的R值,不利于管材厚度方向塑性变形,影响扩口工艺性能。
The X-ray diffraction (XRD) technique was used to study the texture change of 2169N austenitic stainless steel tube by cold drawing and intermediate annealing and its effect on the tube flaring performance. The results show that the layer fault energy of 2169N steel is 27.7M · J / m2, which belongs to the low level fault energy level and the deformation mode is mechanical twins. The pipe has {113} <121> main texture components, {111} and {110} <001> minor texture components. The {110} <001> texture is produced when the pipe is cold-drawn. The {110} <001> and {111} <112> is generated by <111> rotation by about 40 °. The main texture components {113} <112>, the {111} and {110} <001> sub-texture components all showed high R value, which was unfavorable to the plastic deformation in the pipe thickness direction, Craft performance.